Yii create your own widget method instance-random ad image

1. Call widgets

The code is as follows:	Copy code
<? Php $ this-> widget ('widgetname');?>

Or

The code is as follows:	Copy code
<? Php $ widget = $ this-> beginWidget ('path. to. Widgetclass');?>

... Content subject that may be obtained by small objects...

The code is as follows:	Copy code
<? Php $ this-> endWidget ();?>

You can also pass parameters to the Widget class.

The code is as follows:	Copy code
<? Php $ userId = 1;?> <? Php $ this-> widget ('widgetname', array ('userid' => $ userId);?>

The userId parameter is automatically mapped to the same name property of the Widget class. Therefore, when defining a Widget, do not forget to declare this property.

2. Create a Widget

The custom Widget class inherits the CWidget and overwrites the run method.

The code is as follows:	Copy code
<? Php Class BannerMagic extends CWidget { Public function run (){ } }

Or:

The code is as follows:	Copy code
Class MyWidget extends CWidget { Public function init (){ // This method will be called by CController: beginWidget () } Public function run (){ // This method will be called by CController: endWidget () } }

The following is the implementation of BannerMagicWidget.

The code is as follows:	Copy code
<? Php class BannerMagicWidget extends CWidget { Public function run (){ $ Random = rand (1, 3 ); If ($ random = 1 ){ $ Advert = "advert1.jpg "; } Else if ($ random = 2 ){ $ Advert = "advert2.jpg "; } Else { $ Advert = "advert3.jpg "; } $ This-> render ('bannermagic ', array ( "Advert" => $ advert, )); } }

Stored in protectedcomponentsBannerMagicWidget. php

The possible contents of the corresponding view file are as follows:

The code is as follows:	Copy code
"Alt =" whatever "/>

Storage to protectedcomponentsviewsbannermagic. php

3. Call this Widget

The code is as follows:	Copy code
<? Php $ this-> widget ('bannermagicwidget ');?>